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CRYOGENIC VESSELS - SAFETY DEVICES FOR PROTECTION AGAINST EXCESSIVE PRESSURE - PART 1: SAFETY VALVES FOR CRYOGENIC SERVICE
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Available format(s): Hardcopy, PDF
Language(s): English
Published date: 01-01-2008
Publisher: National Standards Authority of Ireland
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.Only cited Standards give presumption of conformance to New Approach Directives/Regulations.Dates of withdrawal of national standards are available from NSAI.
Foreword1 Scope2 Normative references3 Terms and definitions4 Requirements 4.1 General 4.2 Design 4.2.1 Design temperature 4.2.2 Drainage 4.2.3 Stem guiding 4.2.4 Inserts 4.2.5 Sublimating cryogens 4.3 Materials 4.3.1 General 4.3.2 Metallic materials 4.3.3 Corrosion resistance 4.3.4 Oxygen compatibility 4.3.5 Acetylene compatibility 4.3.6 Non-metallic materials5 Testing 5.1 Production testing 5.2 Type testing for cryogenic service 5.2.1 General 5.2.2 Seat leakage test 5.2.3 Cryogenic tests6 Determination of the certified derated coefficient of discharge (K[dr])7 Cleanliness8 MarkingAnnex ZA (informative) Relationship between this European Standard and the Essential Requirements of EC Directive 97/23/EC (PED)Bibliography
Describes the requirements for the design, manufacture and testing of safety valves for cryogenic service, that is to say for operation with cryogenic fluids below -10 Degree C in addition to operation at ambient temperature.
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